Datasheet

LTC2938/LTC2939
16
293839ff
TYPICAL APPLICATIONS
Supply and Temperature Monitor (Mode 1, 5V, 3.3V, 28V, –5.2V, 12V, 100°C)
Buffered V
REF
to Power High Current Circuits
V
REF
V6
LTC2939
*PANASONIC ERTJOEV474J
293839 TA04
121k
1%
467k 1%
RBIAS
93.1k
1%
R1
93.1k
1%
R2
9.53k
1%
RNTC*
470k
12V
28V
–5.2V
100k
1%
10k
1%
100k
1%
C
RT
47nF
V
PG
GND CRT CWT
V3
V5
V4
2150k 1%
5110k 1%
RHYST
280k
1%
5V
0.1μF
3.3V
0.1μF
V1
V2
WDO
WDI
RST
SYSTEM
LOGIC
V
REF
LTC2939
293839 TAO5
2150k 1%
5V
0.1μF
3.3V
2.5V
1.8V
12V
100k
1%
100k
1%
C
RT
47nF
C
WT
47nF
0.1μF
WDI
WDO
RST
V
PG
GND CRT
5V
CWT
V1
V2
V3
V4
V5
V6
124k 1%
1.2V
1.210V
±10mA
MICROPROCESSOR
R1
59k
1%
R2
40.2k
1%
–
+
LT1809